In a medium-sized mixing bowl or included pint container, combine the chilled brewed coffee and pumpkin spice creamer. Stir until well mixed.

Secure the lid on the pint container and place it upright in the freezer. Freeze for at least 24 hours or until the mixture is completely solid.

After the mixture is fully frozen, remove the lid and place the pint container into the Ninja Creami. Select the "Creamiccino" setting and process until smooth and creamy.

Pour the mixture into a glass. Top with whipped topping, and sprinkle with ground cinnamon and pumpkin spice for a seasonal touch.